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Y2 Dermatology > Bacterial, fungal and parasitic infections > Flashcards

Bacterial, fungal and parasitic infections Flashcards

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Dermatology Board Prep flashcards
1
Q

Example of b-haemolytic streptococci

A

strep pyogenes

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2
Q

Treatment of strep pyogenes infections

A

penicillin but will be treated by flucloxacillin

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3
Q

presentation of scabies

A

intensely itchy rash affecting finger webs, wrists and groin

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4
Q

treatment of candida

A

clotrimazole cream, oral fluconazole

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5
Q

y-haemolysis is a ____colour

A

no change in colour

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6
Q

Early presentation of lyme disease

A

erythema migrans

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7
Q

Examples of strep pyogenes infections (4)

A

impetigo, cellulitis, infected eczema, necrotising fasciitis

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8
Q

how does ringworm infect the skin?

A

enters abraded and soggy skin, hyphae spread in the stratum corneum (keratinocyte layer)

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9
Q

Treatment of more extensive areas of ringworm/ on the scalp

A

terbinafine or itraconazole orally

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10
Q

Examples of a-haemolytic streptococci (2)

A

strep. pneumoniae; strep. viridans

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11
Q

Condition showing this type of rash

A

ringworm

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12
Q

signs of infected leg ulcer

A

weepy, sloughy, smelly

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13
Q

Skin condition and causative organisms

A

impetigo - staph aureus/strep pyogene

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14
Q

a-haemolysis is ____ haemolysis

A

partial

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15
Q

where do cadida infections like to be ?

A

in warm, moist areas particularly skin folds

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16
Q

tinea manuum

A

hand ring worm

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17
Q

Treatment of lyme disease

A

amoxicillin or doxycycline

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18
Q

Example of y-haemolytic strep.

A

enterococcus - gut commensals

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19
Q

a-haemolysis is ____ haemolysis

A

partial

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20
Q

a-haemolysis is a ____colour

A

green

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21
Q

Vector for lyme disease

A

ticks

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22
Q

b-haemolysis is a ____colour

A

clear/gold

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23
Q

Identify the type of haemolysis and give an example organism

A

non-haemolytic strep - enterococcus

24
Q

Identify the organism

A

Staph aureus

25
Q

gram positive cocci, chains

A

streptococci

26
Q

2 types of necrotising fasciitis

A
  1. mixed anaerobes/coliforms post-abdominal surgery; 2. Group A strep pyogenes
27
Q

b-haemolytic strep can be commensals - TRUE/FALSE

A

FALSE - b-haemolytic strep are always pathogenic

28
Q

This rash may be seen with which disease

A

Lyme’s disease - erythema migrans

29
Q

Treatment of small areas of ringworm

A

clotrimazole cream/topical nail paint

30
Q

incubation period for scabies

A

6 weeks

31
Q

tinea cruris

A

groin ring worm

32
Q

sarcoptes scabei

A

scabies

33
Q

tinea stands for…

A

ring worm

34
Q

ring worm only infects keratinised tissue - TRUE/FALSE

A

TRUE - hair, nails, skin

35
Q

Identify as coagulase positive or negative

A

coagulase positive - staph aureus

36
Q

treatment of scabies

A

malathion lotion applied over whole body overnight, or benzyl benzoate (avoid in children)

37
Q

Strep viridans is a commensal of (3)

A

mouth, throat, vagina

38
Q

tinea pedis

A

foot ringworm

39
Q

tinea corporis

A

body ring worm

40
Q

Gram positive, coagulase positive, clusters

A

Staph aureus

41
Q

pathogenesis of ringworm infection (5)

A
  1. enters abraded and soggy skin, hyphae spread in the stratum corneum 2. increased epidermal turnover causes scaling 3. inflammatory response in dermis 4. hair follicles and shaft invaded 5. lesions grow outward and heal in centre causing ring appearance
42
Q

a-haemolysis is ___ haemolysis

A

no

43
Q

Identify the type of haemolysis and give an example organism

A

b-haemolysis - Strep. pyogenes

44
Q

tinea capitis

A

scalp ring worm

45
Q

Diagnosis of ringworm

A

appearance and skin/nail scrapings

46
Q

common areas for candida infections (4)

A

under breasts, groin, abdominal skin folds, nappy area in babies

47
Q

late presentation of lyme disease (not essential)

A

heart block, nerve palsies, arthritis

48
Q

Identify the type of haemolysis and give an example organism

A

alpha haemolysis - strep pneumoniae, strep viridans

49
Q

treatment for lice

A

malathion lotion

50
Q

tinea unguium

A

nail ring worm

51
Q

Common infection caused by y-haemolytic strep.

A

UTIs

52
Q

Treatment of staph. aureus skin infections

A

flucloxacillin

53
Q

Describe the gram stain and likely organism

A

Gram pos cocci in chains - streptococci species

54
Q

Common staph aureus infections

A

cellulitis, impetigo, infected eczema, boils, wound infections

55
Q

pediculus capitis/corporis

A

lice

Y2 Dermatology (12 decks)

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